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* Copyright (c) 2010, The University of Texas at Austin
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using System;
using System.Windows;
using Bio.Data.Interfaces;

namespace Bio.Views.Structure.Editor.Internal.Data
{
    internal class LocalNucleotideSequenceVector : IVector
    {
        #region IVector

        public double RayAngle { get; set; }
        public double Magnitude { get; set; }
        public double StartX { get; set; }
        public double StartY { get; set; }

        public IVector Clone()
        {
            return new LocalNucleotideSequenceVector(this);
        }

        #endregion

        public LocalNucleotideSequenceVector()
        {
        }

        public LocalNucleotideSequenceVector(Point startPoint, Point endPoint)
        {
            CalculateVectorFromPoints(startPoint, endPoint);
        }

        public LocalNucleotideSequenceVector(Point location)
        {
            this.StartX = location.X;
            this.StartY = location.Y;
        }

        protected LocalNucleotideSequenceVector(LocalNucleotideSequenceVector toCopy)
        {
            this.RayAngle = toCopy.RayAngle;
            this.Magnitude = toCopy.Magnitude;
            this.StartX = toCopy.StartX;
            this.StartY = toCopy.StartY;
        }

        private void CalculateVectorFromPoints(Point startPoint, Point endPoint)
        {
            StartX = startPoint.X;
            StartY = startPoint.Y;
            RayAngle = Math.PI + Math.Atan2((StartY - endPoint.Y), (StartX - endPoint.X));
            Magnitude = Math.Sqrt(Math.Pow((StartY - endPoint.Y), 2) + Math.Pow((StartX - endPoint.X), 2));
        }
    }
}
